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Wisconsin

$62+ Cheap flights from Ontario (ONT) to Wisconsin

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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Find flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 2, 2025.

This CheapOair deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:05 pmONT - MSP
1 stop10h 09mFrontier
Wed 11/198:51 amMSP - ONT
1 stop14h 36mFrontier
Deal found 10/31$130
This Frontier deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:04 pmONT - MSP
1 stop9h 58mFrontier
Sun 12/77:00 amMSP - ONT
1 stop10h 06mFrontier
Deal found 11/1$134
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:20 pmONT - MSP
1 stop5h 54mFrontier
Mon 12/87:00 amMSP - ONT
1 stop9h 25mFrontier
Deal found 10/31$137
This CheapOair deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmONT - MSP
1 stop6h 09mFrontier
Sat 11/157:50 amMSP - ONT
1 stop5h 20mFrontier
Deal found 10/31$138
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:20 pmONT - MSP
1 stop6h 42mFrontier
Mon 12/157:00 amMSP - ONT
1 stop9h 25mFrontier
Deal found 10/31$142
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmONT - MSP
1 stop6h 09mFrontier
Sun 11/166:00 amMSP - ONT
1 stop7h 10mFrontier
Deal found 10/31$144
This CheapOair deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/74:01 pmONT - MSP
1 stop24h 11mFrontier
Sat 1/108:45 amMSP - ONT
1 stop15h 55mFrontier
Deal found 11/2$146
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/72:59 pmONT - MSP
2 stops31h 03mFrontier
Sun 1/116:45 amMSP - ONT
1 stop19h 14mFrontier
Deal found 10/31$165
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:05 pmONT - ORD
1 stop28h 04mMultiple Airlines
Sat 1/103:24 pmORD - ONT
2 stops25h 07mMultiple Airlines
Deal found 11/1$169
This Trip.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:20 pmONT - MSP
1 stop5h 54mFrontier
Mon 12/157:07 pmMSP - ONT
2 stops28h 10mFrontier
Deal found 10/31$172
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:15 amONT - ORD
2 stops15h 57mMultiple Airlines
Sat 12/69:14 pmORD - ONT
1 stop21h 19mMultiple Airlines
Deal found 11/1$172
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/74:01 pmONT - MSP
1 stop24h 11mFrontier
Wed 1/78:45 amMSP - ONT
1 stop15h 55mFrontier
Deal found 10/31$176

Cheap flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated November 2, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$126
(Kiwi.com)

One-way from

$62
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$423
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
Search Deals
From Ontario to Wisconsin
Search Deals
One-way flight from Ontario to Wisconsin
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Ontario

Fly to

Wisconsin

Route

Depart

Return

Price

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 12/4

12:04 pm-12:02 am

1 stop9h 58m

Minneapolis St Paul

Sun 12/7

7:00 am-3:06 pm

1 stop10h 06m

$134

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Fri 2/6

6:00 am-9:10 pm

1 stop13h 10m

Minneapolis St Paul

Mon 2/9

6:45 am-11:59 pm

1 stop19h 14m

$134

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 12/11

6:15 am-8:16 pm

2 stops12h 01m

Minneapolis St Paul

Sun 12/14

7:00 am-3:06 pm

1 stop10h 06m

$193

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Sun 12/7

2:59 pm-12:02 am

2 stops31h 03m

Minneapolis St Paul

Tue 1/6

12:00 pm-8:13 pm

1 stop10h 13m

$210

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 11/13

12:05 pm-9:20 am

1 stop19h 15m

Minneapolis St Paul

Mon 11/17

6:00 am-11:10 am

1 stop7h 10m

$222

OntarioMilwaukee

ONT - MKE

ONTMKE

Ontario

Fri 11/14

6:53 am-7:19 pm

1 stop10h 26m

Milwaukee-Mitchell

Mon 11/17

8:04 pm-9:27 pm

1 stop27h 23m

$238

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 11/19

12:58 am-9:07 am

1 stop6h 09m

Minneapolis St Paul

Sun 11/23

6:45 am-11:28 am

1 stop6h 43m

$246

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 11/13

10:42 pm-9:20 am

2 stops32h 38m

Minneapolis St Paul

Sun 11/16

4:06 pm-7:17 am

1 stop17h 11m

$254

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 11/12

8:45 am-9:20 am

1 stop22h 35m

Minneapolis St Paul

Fri 11/14

6:00 am-11:50 pm

1 stop19h 50m

$262

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Sun 11/23

12:58 am-9:07 am

1 stop6h 09m

Minneapolis St Paul

Thu 11/27

6:45 am-11:11 am

1 stop6h 26m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Wisconsin

Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Wisconsin

What is the cheapest month to book a flight from Ontario to Wisconsin?

Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $99). Flying from Ontario to Wisconsin in December is currently the most expensive (average of $241). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to WI?

Find hourly flight availability from Ontario to Wisconsin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2025.

It’s optimal to fly from Ontario to Wisconsin at noon. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Ontario to Wisconsin?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Wisconsin. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Wisconsin flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Wisconsin. Reviews last updated November 2, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,001 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,997 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,034 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

  • How long is the flight from Ontario to Wisconsin?

    Frontier, Delta, and United Airlines can get you from Ontario to Wisconsin in just under 5h 36m. Your travel time can differ by up to 9h. Airlines will cover a distance of 1639 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Ontario to Wisconsin?

    The most popular flight routes from Ontario to Wisconsin are Ontario - Chicago O'Hare Intl, Ontario - Minneapolis St Paul and Ontario - Milwaukee-Mitchell.

  • Can I find deals for flights from Ontario to Wisconsin that include hotel bookings?

    Yes. In addition to deals on Ontario to Wisconsin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Wisconsin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Wisconsin.

  • Can I find deals for business class flights from Ontario to Wisconsin?

    Yes. Cheapflights offers flight deals from Ontario to Wisconsin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Wisconsin?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $99). Flying from Ontario to Wisconsin in December is currently the most expensive (average of $241). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Wisconsin

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Top 4 airlines flying from Ontario to Wisconsin

Discover the top 4 airlines that operate flights from Ontario to Wisconsin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$427FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$599FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$519FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$429FlexibilityNo cancel feeOn-time63%

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